$OpenBSD: patch-include_geos_platform_h_in,v 1.2 2014/08/26 19:00:31 landry Exp $

http://trac.osgeo.org/geos/ticket/700

--- include/geos/platform.h.in.orig	Sun Aug 25 17:10:32 2013
+++ include/geos/platform.h.in	Sun Aug 24 11:08:54 2014
@@ -92,7 +92,7 @@ extern "C"
 // sandro furieri: sanitizing MinGW32
 #  define ISNAN(x) (std::isnan(x))
 # elif defined(__OSX__) || defined(__APPLE__) || \
-       defined(__NetBSD__) || defined(__DragonFly__) ||	\
+       defined(__NetBSD__) || defined(__DragonFly__) || defined (__OpenBSD__) || \
        (defined(__sun) && defined(__GNUC__))
    // Hack for OS/X <cmath> incorrectly re-defining isnan() into oblivion.
    // It does leave a version in std.
